986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - P0154 -O2 sensor before ahead of cat. conv. Cylinder (4-6)

Jake Raby · 07-28-2015, 07:41 AM

This can mean that the sensor is out of range, as well. The sensor may NOT be the actual issue, it is possible monitoring a condition that puts it out of range. Check fuel trim values that may indicate a vacuum leak or MAF sensor issue that are leading to this.

All the time people treat a symptom, rather than a condition. It doesn't work.

07-28-2015, 07:41 AM	#2
Jake Raby Engine Surgeon Join Date: Aug 2008 Location: Cleveland GA USA Posts: 2,425	This can mean that the sensor is out of range, as well. The sensor may NOT be the actual issue, it is possible monitoring a condition that puts it out of range. Check fuel trim values that may indicate a vacuum leak or MAF sensor issue that are leading to this. All the time people treat a symptom, rather than a condition. It doesn't work. __________________ Jake Raby/www.flat6innovations.com IMS Solution/ Faultless Tool Inventor US Patent 8,992,089 & US Patent 9,416,697 Developer of The IMS Retrofit Procedure- M96/ M97 Specialist